:root {
  color-scheme: dark;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  --background: #080b0d;
  --panel: #101519;
  --panel-strong: #151c21;
  --line: #263139;
  --muted: #82919b;
  --text: #eef5f3;
  --green: #67f5b4;
  --cyan: #66d9ef;
  --red: #ff727f;
  --amber: #f2c66d;
}

/* Author styles such as #screen { display: block } otherwise override the browser's
   built-in [hidden] rule and leave the first-frame placeholder on top of live video. */
[hidden] {
  display: none !important;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    linear-gradient(rgba(102, 217, 239, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 217, 239, 0.025) 1px, transparent 1px),
    var(--background);
  background-size: 32px 32px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 11, 13, 0.9);
  backdrop-filter: blur(16px);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  margin-top: 4px;
  font-size: clamp(18px, 2vw, 25px);
  font-weight: 650;
  letter-spacing: 0.01em;
}

.eyebrow {
  color: var(--green);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.22em;
}

.state-group {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 5px;
}

.state {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
}

.state[data-kind="pending"] {
  color: var(--amber);
  border-color: rgba(242, 198, 109, 0.4);
}

.state[data-kind="ready"] {
  color: var(--green);
  border-color: rgba(103, 245, 180, 0.4);
  background: rgba(103, 245, 180, 0.06);
}

.state[data-kind="error"] {
  color: var(--red);
  border-color: rgba(255, 114, 127, 0.4);
}

.agent-state {
  color: var(--muted);
  font-size: 11px;
}

main {
  display: grid;
  grid-template-columns: minmax(290px, 350px) 1fr;
  gap: 16px;
  min-height: calc(100vh - 88px);
  padding: 16px;
}

.sidebar,
.workspace {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel,
.event-panel,
.workspace {
  border: 1px solid var(--line);
  background: rgba(16, 21, 25, 0.94);
}

.panel,
.event-panel {
  padding: 16px;
}

.device-list {
  display: flex;
  max-height: min(46vh, 520px);
  flex-direction: column;
  gap: 10px;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 1px 5px 1px 1px;
  scrollbar-color: #40505a transparent;
  scrollbar-width: thin;
}

.device-list:empty {
  display: none;
}

.device-list::-webkit-scrollbar {
  width: 6px;
}

.device-list::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: #40505a;
}

#device-list:not(:empty) + #device-empty {
  display: none;
}

.device-empty {
  display: flex;
  min-height: 150px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 7px;
  padding: 20px;
  border: 1px dashed #33414a;
  border-radius: 10px;
  color: var(--muted);
  text-align: center;
  background: rgba(10, 15, 18, 0.62);
}

.device-empty strong {
  color: var(--text);
  font-size: 12px;
}

.device-empty > span:last-child {
  max-width: 220px;
  font-size: 10px;
  line-height: 1.55;
}

.device-empty-icon {
  display: grid;
  width: 34px;
  height: 34px;
  margin-bottom: 3px;
  place-items: center;
  border: 1px solid #40505a;
  border-radius: 50%;
  color: var(--cyan);
  font-size: 20px;
  font-weight: 300;
}

.device-card {
  position: relative;
  display: flex;
  width: 100%;
  min-height: 154px;
  flex: 0 0 auto;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  border-color: #33414a;
  border-radius: 10px;
  text-align: left;
  background:
    linear-gradient(135deg, rgba(102, 217, 239, 0.055), transparent 48%),
    #0a0f12;
}

.device-card:not(:disabled):hover {
  border-color: #52626d;
  background:
    linear-gradient(135deg, rgba(102, 217, 239, 0.09), transparent 50%),
    var(--panel-strong);
}

.device-card.is-selected,
.device-card.selected,
.device-card.active,
.device-card[aria-current="true"],
.device-card[aria-selected="true"],
.device-card[data-selected="true"] {
  border-color: rgba(103, 245, 180, 0.78);
  background:
    linear-gradient(135deg, rgba(103, 245, 180, 0.12), transparent 52%),
    #0b1213;
  box-shadow:
    inset 3px 0 0 var(--green),
    inset 0 0 0 1px rgba(103, 245, 180, 0.08);
}

.device-card:disabled {
  cursor: default;
  opacity: 0.62;
}

.device-card-topline,
.device-card-header,
.device-facts,
.device-card-facts,
.device-card-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
}

.device-card-topline > span:first-child,
.device-card-header > span:first-child {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 5px;
}

.device-card-topline small,
.device-card-header small,
.device-card-label {
  color: var(--muted);
  font: 9px/1.2 "Cascadia Code", Consolas, monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.device-card-name,
.device-card-id {
  overflow: hidden;
  max-width: 190px;
  font: 600 15px/1.25 "Cascadia Code", Consolas, monospace;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.device-presence,
.device-card-presence {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 10px;
}

.device-presence i,
.device-card-presence i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #53616a;
}

.device-presence[data-online="true"],
.device-card-presence[data-online="true"] {
  color: var(--green);
  border-color: rgba(103, 245, 180, 0.35);
  background: rgba(103, 245, 180, 0.06);
}

.device-presence[data-online="true"] i,
.device-card-presence[data-online="true"] i {
  background: var(--green);
  box-shadow: 0 0 10px rgba(103, 245, 180, 0.8);
}

.device-model,
.device-card-model {
  overflow: hidden;
  color: var(--muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.device-facts,
.device-card-facts {
  justify-content: flex-start;
  color: var(--muted);
  font-size: 10px;
}

.device-facts > span,
.device-card-facts > span {
  display: flex;
  flex: 1 1 0;
  flex-direction: column;
  gap: 5px;
}

.device-facts strong,
.device-card-facts strong {
  color: var(--text);
  font: 600 11px/1.2 "Cascadia Code", Consolas, monospace;
}

.device-card-action {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--green);
  font-size: 11px;
}

.device-card:disabled .device-card-action {
  color: var(--muted);
}

.panel-heading {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
}

.panel-heading span {
  color: var(--cyan);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
}

.panel-heading h2 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.management-summary {
  margin-bottom: 0;
  cursor: pointer;
  list-style: none;
}

.management-summary::-webkit-details-marker {
  display: none;
}

.management-chevron {
  margin-left: auto;
  transition: transform 150ms ease;
}

.device-management[open] .management-chevron {
  transform: rotate(180deg);
}

.device-management-body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

form,
label {
  display: flex;
  flex-direction: column;
}

form {
  gap: 12px;
}

label {
  gap: 6px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.04em;
}

input,
button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--text);
  background: #0a0f12;
  font: inherit;
}

input {
  width: 100%;
  padding: 8px 10px;
  outline: none;
}

input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px rgba(102, 217, 239, 0.1);
}

button {
  padding: 8px 12px;
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease, color 120ms ease;
}

button:hover:not(:disabled) {
  border-color: #52626d;
  background: var(--panel-strong);
}

button.primary {
  color: #06110d;
  border-color: var(--green);
  background: var(--green);
  font-weight: 650;
}

button.primary:hover:not(:disabled) {
  background: #8affc9;
}

button.danger {
  color: var(--red);
  border-color: rgba(255, 114, 127, 0.35);
  background: rgba(255, 114, 127, 0.04);
}

button.danger:hover:not(:disabled) {
  border-color: var(--red);
  background: rgba(255, 114, 127, 0.1);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.35;
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.device-management-actions {
  margin-top: 10px;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.settings-grid .wide {
  grid-column: 1 / -1;
}

.hint {
  margin-top: 12px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}

.telemetry pre {
  overflow: auto;
  max-height: 160px;
  margin: 0;
  color: #b5c5ce;
  font: 11px/1.5 "Cascadia Code", Consolas, monospace;
  white-space: pre-wrap;
}

.workspace {
  min-width: 0;
  padding: 0;
  background: rgba(10, 14, 17, 0.84);
}

.screen-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 46px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 11px;
}

.live-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
}

.screen-stage {
  position: relative;
  display: grid;
  flex: 1 1 300px;
  place-items: center;
  overflow: hidden;
  min-height: clamp(260px, 42vh, 500px);
  padding: 18px;
  background: radial-gradient(circle at center, #172026 0, #0a0e11 60%);
}

.screen-navigation {
  position: sticky;
  bottom: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  flex: 0 0 auto;
  gap: 10px;
  padding: 12px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(10, 15, 18, 0.96);
  box-shadow: 0 -14px 30px rgba(0, 0, 0, 0.42);
}

.screen-navigation button {
  min-height: 56px;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.04em;
}

.screen-navigation button[data-action="home"]:not(:disabled) {
  color: var(--green);
  border-color: rgba(103, 245, 180, 0.55);
  background: rgba(103, 245, 180, 0.07);
}

.owner-unlock {
  margin: 12px;
  padding: 14px;
  border: 1px solid rgba(255, 190, 92, 0.35);
  border-radius: 8px;
  background: rgba(255, 190, 92, 0.045);
}

.owner-unlock-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.owner-unlock-heading div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.owner-unlock-heading small {
  color: var(--muted);
}

.pin-keypad {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  max-width: 420px;
  margin: 14px auto 0;
}

.pin-keypad button {
  min-height: 48px;
  font-size: 17px;
  font-weight: 650;
}

#screen {
  display: block;
  max-width: 100%;
  max-height: min(72vh, 900px);
  border: 1px solid #35434c;
  border-radius: 16px;
  background: #000;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
  touch-action: none;
  user-select: none;
}

#screen.interactive {
  cursor: crosshair;
}

.empty-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  text-align: center;
}

.empty-screen small {
  color: #52616a;
}

.phone-outline {
  width: 80px;
  height: 144px;
  margin-bottom: 14px;
  border: 1px solid #43515a;
  border-radius: 14px;
  box-shadow: inset 0 0 0 5px #0e1317;
}

.event-panel {
  flex: 0 0 150px;
  margin: 0 12px 12px;
  overflow: hidden;
}

#event-log {
  overflow: auto;
  max-height: 86px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font: 10px/1.7 "Cascadia Code", Consolas, monospace;
}

#event-log .error {
  color: var(--red);
}

#event-log .warning {
  color: var(--amber);
}

@media (max-width: 840px) {
  .topbar {
    align-items: flex-start;
    padding: 16px;
  }

  main {
    grid-template-columns: 1fr;
  }

  .device-list {
    display: grid;
    max-height: 360px;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  }

  .screen-stage {
    min-height: clamp(280px, 52vh, 520px);
  }
}

@media (max-width: 520px) {
  .topbar {
    gap: 16px;
  }

  .state-group {
    max-width: 45%;
  }

  .screen-navigation {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    padding: 8px;
  }

  .screen-navigation button {
    min-height: 54px;
    padding: 10px 6px;
    font-size: 13px;
  }

  .device-list {
    display: flex;
    max-height: 330px;
  }

  .device-management-actions {
    grid-template-columns: 1fr;
  }
}